heres a new one for you - got a compost heap?
make up a lattice with copper pipe and put it in the centre of your compost heap
pipe it up with a small radiator in your shed or greenhouse fill it with water and antifreeze mix and put in small pump (solar powered is ideal) and hey presto free heating
dont believe me put your hand into your compost heap and feel the heat
Sunday, 28 August 2011
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